三氯化铝/盐酸三甲胺离子液体中电沉积制备Al-Ni合金镀层  

Electrodeposition of Al-Ni Alloy Coatings in AlCl_3/Trimethylamine Hydrochloride Ionic Liquid

作　　者：侯媛媛[1,2] 李瑞乾 梁军 苏培博[3] 鞠鹏飞 HOU Yuan-yuan;LI Rui-qian;LIANG Jun;SU Pei-bo;JU Peng-fei(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100039,China;Shanghai Aerospace Equipment Manufacturer,Shanghai 200245,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000 [2]中国科学院大学,北京100039 [3]上海航天设备制造总厂,上海200245

出　　处：《表面技术》2018年第7期230-235,共6页Surface Technology

基　　金：国家自然科学基金资助项目(51401127;51771122);上海市青年科技启明星计划(15QB1401500;16QB1401100)~~

摘　　要：目的研究离子液体中Ni^(2+)浓度对Al-Ni合金镀层结构和成分的影响,同时考察电流密度对镀层表面形貌和织构的影响。方法采用脉冲电流法,在含有不同浓度氯化镍的无水三氯化铝/盐酸三甲胺离子液体中,于不同电流密度下电沉积制备Al-Ni合金镀层。利用扫描电子显微镜、X射线衍射技术和能谱分析仪探究离子液体中Ni^(2+)的浓度对Al-Ni合金镀层结构和成分的影响,考察电流密度对镀层表面形貌和织构的影响。结果随着离子液体中Ni^(2+)浓度的增加,镀层中镍的含量增多,表面胞状颗粒逐渐变小,表面趋于均匀,当Ni^(2+)的浓度为0.2 mol/L时,形成铝镍金属间化合物。另外,随着电流密度的增加,镀层表面形貌由针状晶体变为棒状颗粒,并且颗粒逐渐增大。结论离子液体中Ni^(2+)的浓度和电流密度对Al-Ni合金镀层表面形貌、结构和成分有一定的影响。当溶液中Ni^(2+)的浓度为0.2 mol/L、电流密度为6 m A/cm^2时,电沉积4 h可制备得到厚度为10μm、由3μm大小晶粒组成、含有铝镍金属间化合物的合金镀层。This work aims to study the effects of Ni2+concentration in ionic liquid on structure and composition of Al-Ni alloy coatings,and current density on surface morphology and texture of the coatings.The Al-Ni alloy coatings were prepared in the method of pulse current at different current density in AlCl3/trimethylamine hydrochloride ionic liquid containing different concentration of Ni2+.Besides,the effects of Ni2+concentration in ionic liquid on structure and composition of Al-Ni alloy coatings were studied using SEM,XRD and EDS,and the effects of current density on surface morphology and texture of the coatings were investigated.As Ni2+concentration increased in the ionic liquid,Ni content in the coatings increased,cellular particle size decreased,the surface tended to be uniform,and aluminum nickel intermetallic compound formed at the Ni2+concentration of 2 mol/L.In addition,as current density increased,surface morphology of the coatings transformed from acicular crystal to claviform particle which gradually increased.The Ni2+concentration and current density have certain influence on surface morphology,structure and composition of the Al-Ni alloy coatings.Provided with current density of 6 mA/cm2 and Ni2+concentration of 0.2 mol/L,10μm thick Al-Ni alloy coatings containing intermetallic compounds and consisting of 3μm grains can be obtained after being electrodeposited for 4 h in the method of pulse current.

关 键 词：AL-NI合金 电沉积 离子液体 镍离子浓度 电流密度 织构 

分 类 号：TQ153[化学工程—电化学工业]